diff options
Diffstat (limited to 'c/src/lib/libbsp/or32/orp/clock/clockdrv.c')
| -rw-r--r-- | c/src/lib/libbsp/or32/orp/clock/clockdrv.c | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/c/src/lib/libbsp/or32/orp/clock/clockdrv.c b/c/src/lib/libbsp/or32/orp/clock/clockdrv.c deleted file mode 100644 index 7577d11e4c..0000000000 --- a/c/src/lib/libbsp/or32/orp/clock/clockdrv.c +++ /dev/null @@ -1,225 +0,0 @@ -/* ckinit.c - * - * This file provides a template for the clock device driver initialization. - * - * COPYRIGHT (c) 1989-1999. - * On-Line Applications Research Corporation (OAR). - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.com/license/LICENSE. - * - * $Id$ - */ - -#include <stdlib.h> - -#include <rtems.h> -#include <rtems/libio.h> -#include <bsp.h> -static void (*old_handler)(unsigned int,unsigned int,unsigned int,unsigned int); - -void Clock_exit( void ); -void Clock_isr( rtems_vector_number vector,unsigned int pc, - unsigned int address, unsigned int sr); - -/* - * The interrupt vector number associated with the clock tick device - * driver. - */ - -#define CLOCK_VECTOR 8 - -/* - * Clock_driver_ticks is a monotonically increasing counter of the - * number of clock ticks since the driver was initialized. - */ - -volatile uint32_t Clock_driver_ticks; - -/* - * Clock_isrs is the number of clock ISRs until the next invocation of - * the RTEMS clock tick routine. The clock tick device driver - * gets an interrupt once a millisecond and counts down until the - * length of time between the user configured microseconds per tick - * has passed. - */ - -uint32_t Clock_isrs; /* ISRs until next tick */ - -/* - * These are set by clock driver during its init - */ - -rtems_device_major_number rtems_clock_major = ~0; -rtems_device_minor_number rtems_clock_minor; - -void Clock_exit( void ); - -/* Write this to restart the Timer. Sets mode = 01, - interrupts enabled, interrupt not pending, report - at 200,000 (1 msec on 200 MHz CPU) */ -static const unsigned int TTMR_RESET = 0x60030D40; - -/* - * Isr Handler - */ - -void Clock_isr(uint32_t vector, - uint32_t pc, - uint32_t ear, - uint32_t sr) -{ - register int pending; - register int value = 0x60002710; - - /* Was it us? */ - asm volatile ("l.mfspr %0,r0,0x4802 \n\t" /* Read the PIC status */ - "l.andi %0,%0,0x8 \n\t" : "=r" (pending)); - - if(pending) - { - rtems_clock_tick(); - asm ("l.mtspr r0,%0,0x5000 \n\t" :: "r" (value)); - } - - if(old_handler) - (*old_handler)(vector,pc,ear,sr); -} - -/* - * Install_clock - * - * Install a clock tick handler and reprograms the chip. This - * is used to initially establish the clock tick. - */ - -void Install_clock() -{ - uint32_t tmp,sr,ttmr,ttcr; - extern uint32_t Or1k_Interrupt_Vectors[16]; - - ttmr = TTMR_RESET; /* Reset value */ - ttcr = 0; /* Start at 0 */ - - /* - * Initialize the clock tick device driver variables - */ - - /* Make sure the Timer (interrupt 3) is enabled and - reports a high prority interrupt */ - - asm volatile ("l.mfspr %0,r0,0x4800 \n\t" /* Get the PIC mask */ - "l.ori %0,%0,0x8 \n\t" /* Enable int 3 */ - "l.mtspr r0,%0,0x4800 \n\t" /* Write back mask */ - "l.mfspr %0,r0,0x4801 \n\t" /* Get priority mask */ - "l.ori %0,%0,0x8 \n\t" /* Set us to high */ - "l.mtspr r0,%0,0x4801 \n\t" /* Write back to PICPR */ - : "=r" (tmp)); - - /* Generate a 1 kHz interrupt */ - asm volatile ("l.mfspr %0,r0,0x11 \n\t" /* Get the current setting */ - "l.addi %1,r0,-5 \n\t" - "l.and %1,%1,%0 \n\t" /* Turn off interrupts */ - "l.mtspr r0,%1,0x11 \n\t" /* Set it in SR */ - "l.mtspr r0,%2,0x5000\n\t" /* Set TTMR */ - "l.mtspr r0,%3,0x5100\n\t" /* Set TTCR */ - : "=&r" (sr), "=&r" (tmp) : "r" (ttmr), "r" (ttcr)); - - old_handler = (void(*)(unsigned int,unsigned int,unsigned int,unsigned int)) - Or1k_Interrupt_Vectors[8]; - Or1k_Interrupt_Vectors[8] = (uint32_t)Clock_isr; - - asm volatile ("l.mtspr r0,%0,0x11\n\t":: "r" (sr)); - - Clock_driver_ticks = 0; - - /* - * Schedule the clock cleanup routine to execute if the application exits. - */ - - atexit( Clock_exit ); -} - -/* - * Clean up before the application exits - */ - -void Clock_exit( void ) -{ - register int temp1; - register int temp2; - - /* In the case of a fatal error, we should shut down - all the interrupts so we don't get woken up again. */ - /* First, turn off the clock in the PIC */ - - asm volatile ("l.mfspr %0,r0,0x4800 \n\t" /* Get the PIC mask */ - "l.addi %1,%1,-9 \n\t" /* Create a mask to disable */ - "l.and %0,%1,%0 \n\t" /* Mask us out */ - "l.mtspr r0,%0,0x4800 \n\t" /* Write back mask */ - "l.mfspr %0,r0,0x4801 \n\t" /* Get priority mask */ - "l.and %0,%1,%0 \n\t" /* Set us to low */ - "l.mtspr r0,%0,0x4801 \n\t" /* Write back to PICPR */ - : "=r" (temp1), "=r" (temp2)); - - /* Now turn off the clock at the timer */ - asm volatile ("l.mtspr r0,r0,0x5000\n\t" /* Clear TTMR */ - "l.mtspr r0,r0,0x5100\n\t"); /* Clear TTCR */ -} - -/* - * Clock_initialize - * - * Device driver entry point for clock tick driver initialization. - */ - -rtems_device_driver Clock_initialize( - rtems_device_major_number major, - rtems_device_minor_number minor, - void *pargp -) -{ - Install_clock(); - - /* - * make major/minor avail to others such as shared memory driver - */ - - rtems_clock_major = major; - rtems_clock_minor = minor; - - return RTEMS_SUCCESSFUL; -} - -rtems_device_driver Clock_control( - rtems_device_major_number major, - rtems_device_minor_number minor, - void *pargp -) -{ - uint32_t isrlevel; - rtems_libio_ioctl_args_t *args = pargp; - - if (args == 0) - goto done; - - /* - * This is hokey, but until we get a defined interface - * to do this, it will just be this simple... - */ - - if (args->command == rtems_build_name('I', 'S', 'R', ' ')) - { - Clock_isr(CLOCK_VECTOR,0,0,0); - } - else if (args->command == rtems_build_name('N', 'E', 'W', ' ')) - { - rtems_interrupt_disable( isrlevel ); - (void) set_vector( args->buffer, CLOCK_VECTOR, 1 ); - rtems_interrupt_enable( isrlevel ); - } - -done: - return RTEMS_SUCCESSFUL; -} |